Visible-light-mediated alkylation of 4-alkyl-1,4-dihydropyridines with alkenyl sulfones
作者:Fuyang Yue、Jianyang Dong、Yuxiu Liu、Qingmin Wang
DOI:10.1039/d1ob01806j
日期:——
Herein we report a mild, general protocol for visible-light-mediated alkylation of 4-alkyl-1,4-dihydropyridines with alkenyl sulfones. The protocol permits efficient functionalization of sulfones with a broad range of cyclic and acyclic secondary and tertiary alkyl groups and is scalable to the gram level. Its excellent functional group tolerance and mildness make it suitable for late-stage functionalization
Strong Bicyclic Guanidine Base-Promoted Wittig and Horner−Wadsworth−Emmons Reactions
作者:Daniele Simoni、Marcello Rossi、Riccardo Rondanin、Angelica Mazzali、Riccardo Baruchello、Cinzia Malagutti、Marinella Roberti、Francesco Paolo Invidiata
DOI:10.1021/ol0001665
日期:2000.11.1
[GRAPHICS]A convenient procedure to effect the Wittig and Horner-Wadsworth-Emmons reactions employs guanidine TBD and MTBD as base-promoters; mild reaction conditions, high efficiency, and facile isolation of the final products make the present methodology, at least in some cases, a practical alternative to known procedures.